We are all immersed in cars; we rebuilt our cities and lives around them. But remember, in the sweep of human history, cars are a recent experiment and many of our early suppositions are proving false.
Suppostion: "Cars get us there faster." Yes, that was true for a while but the data keeps rolling in and wow, in cities, it seems they actually slow everyone down. 
Supposition: “Cars are a universal solution that work for everyone.” They seemed to work for the early adopters and some later ones as well but we are becoming increasingly aware of the vast inequities cars create.
Supposition: “Cars can be safe.” They were deadly from the start but the hope has been that the next new technology will render cars harmless. Tragically, the carnage continues.
Supposition: "Cars are sustainable." Uh, no.
